How to Crop image using C#.Net Windows Application

Introduction:

In this article I will explain about how to crop image/photo using C#.Net Windows Application.

Description:

I have working with one of the application, i got the requirements like Cropping image/photo passport size

First we need to display image in windows form using pictureBox control .here we have added 2 pictureBox controls ie pictureBox1=picOriginal and pictureBox2=picCropped. The Desing window as shown in bellow

 Set the pictureBox1 properties:
Add the image which image u want to crop
pictureBox1 events Click : MouseUp,MouseMove,MouseDown,Paint

C#.Net Code Snippet: 

Now open the code behind the file and add the following code. 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace Usage_CsharpControls
{
    public partial class CropImage : Form
    {
        //create variables for cropping rectanglesize ie x-axis, y-axis, width and height
        int cropX, cropY, cropWidth, cropHeight;

        public CropImage()
        {
            InitializeComponent();
        }

        private void picOrigional_MouseUp(object sender, MouseEventArgs e)
        {
            Cursor = Cursors.Default;
            if (cropWidth < 1)
            {
                return;
            }
            Rectangle rect = new Rectangle(cropX, cropY, cropWidth, cropHeight);
            Bitmap bit = new Bitmap(picOriginal.Image, picOriginal.Width, picOriginal.Height);
            Bitmap crop = new Bitmap(cropWidth, cropHeight);
            Graphics gfx = Graphics.FromImage(crop);
            gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;//here add  System.Drawing.Drawing2D namespace;
            gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;//here add  System.Drawing.Drawing2D namespace;
            gfx.CompositingQuality = CompositingQuality.HighQuality;//here add  System.Drawing.Drawing2D namespace;
            gfx.DrawImage(bit, 0, 0, rect, GraphicsUnit.Pixel);
            picCropped.Image = crop;
            picOriginal.Refresh();
        }

        private void picOrigional_MouseMove(object sender, MouseEventArgs e)
        {
            if (picOriginal.Image == null)
                return;

            if (e.Button == MouseButtons.Left)//here i have use mouse click left button only
            {
                picOriginal.Refresh();
                cropWidth = e.X - cropX;
                cropHeight = e.Y - cropY;
            }
            picOriginal.Refresh();
        }
        //here rectangle border pen color=red and size=2;
        Pen borderpen = new Pen(Color.Red, 2);
        //fill the rectangle color =white
        SolidBrush rectbrush = new SolidBrush(Color.FromArgb(100, Color.White));

        private void picOrigional_Paint(object sender, PaintEventArgs e)
        {
            Rectangle rect = new Rectangle(cropX, cropY, cropWidth, cropHeight);
            Graphics gfx = e.Graphics;
            gfx.DrawRectangle(borderpen, rect);
            gfx.FillRectangle(rectbrush, rect);
        }

        private void picOrigional_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)//here i have use mouse click left button only
            {
                picOriginal.Refresh();
                cropX = e.X;
                cropY = e.Y;
                Cursor = Cursors.Cross;
            }
            picOriginal.Refresh();
        }
    }
}

If you run the application the output look like this